\begin{tikzpicture}
    \draw (0, 0) rectangle (10, 2);
    \draw (7.8, 0) -- (7.8, 2);
    \draw (7.8, 0.2) -- (10, 0.2);
    \draw (9.7, 0) -- (9.7, 0.2);
    \draw [fill=black] (9.7, 0) rectangle (10, 0.1);

    \node at (4, 1) {氮气$78\%$};
    \node at (8.8, 1) {氧气$21\%$};
    \draw (8.2, 0.1) -- (7.8, -0.2) node [left] {惰性气体$0.94\%$};
    \draw (9.85, 0.15) -- (7.8, -0.6) node [left] {二氧化碳$0.03\%$};
    \draw (9.85, 0.05) -- (8.9, -1.0) node [left] {其它气体和杂质$0.03\%$};
\end{tikzpicture}

